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Summary Information for Field Activity 1984-006-FA

Area of Operations: Enewetak Atoll, Enewetok, Marshall Islands, Trust Territory of the Pacific Islands (TTPI), North Pacific

Dates: June 10, 1984 to July 08, 1984

Chief scientist: Dave Folger

   R.C. Hollar - Party Chief, Meridian Ocean Systems

Objectives: Geologic investigations of two nuclear craters.

Type of Activity: Sea floor mapping;Sea floor mapping

Information to be derived:

Summary: In Enewetak Lagoon 12 June - 5 July; on survey 19 June - 4 July following navigation set up and area reconnaissance. This operation was the first of several phases of investigation of two nuclear test craters, OAK and KOA, in the northern part of Enewetak Atoll. Data were acquired in parallel-line grids having nominal line spacings of 26 km (85 ft) for bathymetry, and 76 m (250 ft) for sidescan sonar and sub-bottom (Huntec boomer) profiles. Tie-line data were also acquired. Additional bathymetric data were acquired by small boat. The ship was operated only during daylight hours because hazards from shallow water and proximity to the reef required maximum visibility. A mosaic of the sidescan sonar images was constructed from the field data during the operation. A tide gauge was deployed in each of the craters for bathymetric corrections, although only the KOA gauge appears to have operated successfully. Bathymetry data: 350 km; Sidescan sonar data: 210 km; Sub-bottom profiler (Huntec) data: 115 km.

Contact: Dave Folger ()

InfoBank: uses the identifier E-2-84-CP. Visit this site for more information.

Related Links:

Platform Info:
EGABRAG II

Publications resulting from these data

Folger, D. W.,1986, Introduction, in Folger, D. W., ed., Sea-floor observations and subbottom seismic characteristics of OAK and KOA craters, Enewetak Atoll, Marshall Islands: U.S. Geological Survey Bulletin 1678, p. 1-7. (Also available at http://pubs.er.usgs.gov/usgspubs/b/b1678)

Folger, D. W., Hampson, J. C., Robb, J. M., Woellner, R. A., Foster, D. S., and Tavares, L. A.,1986, Bathymetry of OAK and KOA craters, Chapter A in Folger, D. W., ed., Sea-floor observations and subbottom seismic characteristics of OAK and KOA craters, Enewetak Atoll, Marshall Islands: U.S. Geological Survey Bulletin 1678, p. A1-A35. (Also available at http://pubs.er.usgs.gov/usgspubs/b/b1678)

Data Types and Locations:

 

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